Crankshaft, Main Bearings, And Engine Block; Exploded View; Removal - Mercury MerCruiser Service Manual

Engine Disassembly

Crankshaft, Main Bearings, and Engine Block

Exploded View

d
c
h
b
a

Removal

If only the main bearings are being serviced, refer to Section 3B ‑ Main Bearings without Crankshaft Removed.
NOTE: Engine port and starboard cylinder heads are removed for illustration clarity.
1. Ensure that all bearing caps are marked so that they can be installed in their original locations.
a
Page 3A-40
e
l
© 2016 Mercury Marine
a - Main bearing cap
b - Main bearings upper
c - Crankshaft
d - Main bearings lower
f
e - Lower thrust bearing
f - Oil seal
g - Crankshaft dowel
h - Crankshaft key
g
i - Upper thrust bearing
j - Rear bearing cap
k - Dowel rear bearing cap
l - Main bearing bolts
i
j
k
59488
b
55071
90-8M0099748 eng DECEMBER 2015
a - Main bearing cap
b - Bearing cap marks